Chainho, P., Fernandes, A., Amorim, A., Avila, S.P., Canning-Clode, J., Castro, J.J., et al. (2015). Non-indigenous species in Portuguese coastal areas, coastal lagoons, estuaries and islands. Estuarine Coastal and Shelf Science, 167, 199-211.
Torres, P., da Cunha, R.T., Maia, R. & Rodrigues, A.D. (2014). Trophic ecology and bioindicator potential of the North Atlantic tope shark. Science of the Total Environment, 481, 574-581.